CN114637064A - Blue light filtering film and display device - Google Patents
Blue light filtering film and display device Download PDFInfo
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- CN114637064A CN114637064A CN202011500821.3A CN202011500821A CN114637064A CN 114637064 A CN114637064 A CN 114637064A CN 202011500821 A CN202011500821 A CN 202011500821A CN 114637064 A CN114637064 A CN 114637064A
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
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Abstract
The invention discloses a blue light filtering film and a display device, wherein the blue light filtering film comprises: a substrate layer; the near infrared light reflecting layer is positioned on the light emergent side of the substrate layer; and the blue light blocking layer is positioned on the light emitting side of the near-infrared light reflecting layer. The blue light membrane setting will be strained in current display device, the light that makes in the current display device send passes through near infrared reflection layer, near infrared reflection layer is used for reflecting near infrared light, can reduce the substrate effectively and have thermal-insulated effect to thermal absorption, light reachs the blue light barrier layer behind near infrared reflection layer, the blue light barrier layer can separation ultraviolet ray and short wavelength visible light, thereby reduce the blue light energy, the blue light that high energy is harmful like this can be filtered, reduce the injury to the eyes of people.
Description
Technical Field
The invention relates to the field of display equipment, in particular to a blue light filtering film and display equipment.
Background
K12 and colleges and universities have started to widely popularize and apply education interaction large screens, the use frequency of students and teachers is often higher than that of ordinary people, a part of blue light of the traditional liquid crystal display large screen has certain influence or harm on eyesight and eyes of people who watch for a long time, and the technology that the education interaction large screen needs truly healthy eye protection technology becomes a hard technical requirement.
Although the cornea and lens of the human eye filter out ultraviolet UVB and most UVA. But the short-wavelength blue-violet light with larger energy can penetrate through the crystalline lens to directly reach the retina to cause damage to the eye, and the part of the short-wavelength blue-violet light is called high-energy blue light, and the spectrum range of the high-energy blue light is 415-455nm (excluding the spectrum of the blue light with the wavelength of 455 nm). The high-energy blue light directly reaches the retina, photochemical injury generates cytotoxic free radicals, retinal pigment epithelial cells die, photosensitive cells lack nutrients, and diseases such as macular degeneration, cataract, glaucoma and the like can be induced in severe cases.
The existing touch liquid crystal display screen is directly applied to education exchange teaching and can cause great harm to human eyes.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a blue-light filtering film and a display device, which solve the problem in the prior art that the blue light generated by directly applying a liquid crystal display screen to education exchange teaching has great harm to human eyes.
The technical scheme of the invention is as follows:
a blue light filtering film comprising: a substrate layer;
the near infrared light reflecting layer is positioned on the light emergent side of the substrate layer;
and the blue light blocking layer is positioned on the light emitting side of the near-infrared light reflecting layer.
Further, the blue light filtering film further comprises:
and the hard coating is arranged on the light incidence surface of the substrate layer.
Further, the blue light filtering film further comprises:
the adhesive layer is arranged on the light emitting surface of the blue light blocking layer;
the release layer is arranged on the light emitting surface of the adhesion layer in a peelable manner.
Further, the blue light blocking layer includes: salicylate-based compounds and/or benzophenone-based compounds; or
The blue light blocking layer is an evaporation deposit of Ti3O5 and SiO 2.
Further, the near-infrared light reflecting layer includes titanium dioxide.
Further, the visible light reflectivity of the blue light filtering film is as follows: 12% -15%;
ultraviolet permeability is: 1.5 to 1.7 percent.
Further, the sunlight absorptivity of the blue light filtering film is as follows: 30 percent;
the solar reflectance is: 19 percent;
the solar light transmittance is: 51 percent.
Based on the same concept, the present invention also includes a display apparatus comprising:
the backlight module comprises a light source;
the display panel is positioned on the light-emitting side of the backlight module; and
the blue light filtering film is positioned on the light emitting side of the display panel.
Further, the dominant wavelength of the light emitted by the light source is 455nm-465 nm.
Further, the display apparatus further includes:
the glass cover plate is positioned on one side, back to the light source, of the blue light filtering film;
the optical adhesive layer is positioned between the glass cover plate and the blue light filtering film and is connected with the glass cover plate and the blue light filtering film.
Further, the glass cover plate and the blue light filtering film are completely attached to the optical adhesive layer.
The beneficial effect of this scheme: the invention provides a blue light filtering film and display equipment, wherein the blue light filtering film is arranged in the existing display equipment, so that light emitted by the existing display equipment passes through a near infrared light reflecting layer, the near infrared light reflecting layer is used for reflecting near infrared light, the absorption of a substrate to heat can be effectively reduced, the heat is insulated, the light reaches a blue light blocking layer after passing through the near infrared light reflecting layer, the blue light blocking layer can block ultraviolet light and short-wavelength visible light, the blue light energy is reduced, high-energy harmful blue light can be filtered, and the harm to human eyes is reduced. Simultaneously, near infrared reflection stratum with the blue light barrier layer has different refracting indexes, utilizes the refracting index difference of rete material, can effectual reduction and filter the blue light, further reduces the high energy blue light that jets into in the people's eye, reaches the safety standard, solves among the prior art with liquid crystal display direct application to the education exchange teaching and the blue light that produces has the problem of great injury to people's eye.
Drawings
FIG. 1 is a left side view of one embodiment of a blue light filtering film of the present invention;
FIG. 2 is a cross-sectional view of one embodiment of a display device of the present invention;
FIG. 3 is a cross-sectional view of an embodiment of a glass cover portion of a display device of the present invention.
The reference numbers in the figures: 100. a blue light filtering film; 110. a substrate layer; 120. a near-infrared light reflecting layer; 130. a blue light blocking layer; 140. coating a hard layer; 150. an adhesive layer; 160. a release layer; 200. a backlight module; 300. a display panel; 400. a light source; 500. a glass cover plate; 600. and an optical adhesive layer.
Detailed Description
The invention provides a blue light filtering film and a display device, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the present invention provides a blue light filtering film 100, including: the substrate layer 110, the substrate layer 110 adopts the PET transparent material, the light-emitting side of substrate layer 110 is provided with near infrared reflection layer 120, near infrared reflection layer 120 is arranged in the near infrared light of reflection light, the light-emitting side of near infrared reflection layer 120 is provided with blue light barrier layer 130, blue light barrier layer 130 is used for blue light barrier layer 130 can the separation ultraviolet ray and the short wavelength visible light to reduce blue light energy.
Will strain blue light membrane 100 and set up in current display device, the light that makes in the current display device send passes through near infrared reflection layer 120, near infrared reflection layer 120 is used for reflecting near infrared light, can reduce the substrate effectively and have thermal-insulated effect to thermal absorption, light reachs blue light barrier layer 130 behind near infrared reflection layer 120, blue light barrier layer 130 can separation ultraviolet ray and short wavelength visible light, thereby reduce the blue light energy, the harmful blue light of high energy can be filtered like this, reduce the injury to the eyes of people. Simultaneously, the near infrared reflection stratum with blue light barrier layer 130 has different refracting indexes, utilizes the refracting index difference of rete material, can effectual reduction and filter the blue light, further reduces the high energy blue light that jets into in the people's eye, reaches the safety standard, solves among the prior art with liquid crystal display direct application to in the education exchange teaching and the blue light that produces has the problem of great injury to people's eye.
As shown in fig. 1, the specific structure of this embodiment is as follows: the blue light blocking layer 130 may be a UV blocking material, and the blue light blocking layer 130 specifically includes: salicylate compounds or benzophenone compounds or a mixture of the salicylate compounds and the benzophenone compounds. Or the blue light blocking layer 130 is Ti3O5And SiO2And evaporating the attachments.
Taking benzophenone compounds as an example, the benzophenone compounds as the UV barrier material have excellent high-efficiency anti-aging performance, can absorb ultraviolet light of 240-plus-340 nm, and have the characteristics of light color, no toxicity, good compatibility, small mobility, easy processing and the like. It has maximum protection for the polymer and helps to reduce color while retarding yellowing and retarding physical property loss. The high-strength polyethylene can be widely used in PE, PVC, PP, PS, PC, organic glass, polypropylene fiber, ethylene vinyl acetate and the like. But also has good light stability effect on dry phenolic aldehyde, alkyd varnish, polyurethane, acrylic acid, epoxy and other air drying products.
With Ti3O5And SiO2As an example of the deposition of the deposit as the blue light blocking layer 130, high refractive index titanium oxide (Ti) is used3O5) Silicon dioxide (SiO) as a layer and with a low refractive index2) The blue light is stacked as a layer and attached to the near-infrared light reflecting layer 120 by evaporation, so that part of high-energy blue light is filtered out, and light chromatic aberration is not easy to generate. Ti3O5Has a high refractive index of 2.35/500 nm; SiO22Has a low refractive index of 1.46/500 nm. Through two layers of materials with different refractive indexes, blue light is filtered. And can block ultraviolet light and short wavelength visible light.
The material of the near infrared light reflecting layer 120 includes titanium dioxide. The nanometer titanium dioxide has small grain diameter and high transparency. Has 80-90% of reflection intensity in the near infrared region of 780-2500 nm. The ability of the near-infrared light reflecting layer 120 to reflect light is improved. The absorption of the base material to heat can be effectively reduced, and the surface temperature and the conduction of an object are reduced, so that the aims of reducing energy consumption and reducing emission are fulfilled. The light ray firstly passes through the substrate layer 110 and then enters the near-infrared light reflection layer 120, and enters the blue light blocking layer 130 from the light emitting surface of the near-infrared light reflection layer, the near-infrared light reflection layer and the blue light blocking layer 130 have different refractive indexes, and by utilizing the refractive index difference of the film layer materials, the blue light can be effectively reduced and filtered, and the high-energy blue light emitted into human eyes is reduced.
As shown in fig. 1, the blue light filtering film 100 in this embodiment further includes: and the hard coating layer 140 is arranged on the light incident surface of the substrate layer 110. Scribble the mixed layer that hard coat 140 is silicon material and resin, make whole blue light membrane 100 of straining have certain hardness through scribbling hard coat 140, make and strain blue light membrane 100 and have the characteristic of tempering membrane, when straining blue light membrane 100 and paste when using on glass apron 500, can make glass exempt from the tempering and reach explosion-proof effect.
An adhesive layer 150 is disposed on the light emitting surface of the blue light blocking layer 130, and the adhesive layer 150 is used for conveniently attaching the blue light filtering film 100 to the surface of the glass requiring blue light filtering. The adhesive layer 150 is made of OCA (optically Clear adhesive) which is a special adhesive for gluing transparent optical elements (such as lenses). The adhesive has the characteristics of no color, transparency, light transmittance of more than 90 percent, good bonding strength, capability of being cured at room temperature or middle temperature, small curing shrinkage and the like. The double-sided adhesive tape is convenient for attaching the blue light filtering film 100 to the surfaces of glass and other components needing blue light filtering. A release layer 160 is arranged on the light-emitting surface of the adhesive layer 150, and the release layer 160 is arranged on the surface of the adhesive layer 150 in a peelable manner. The release layer 160 is used for protecting the bonding surface of the blue light filtering film 100, when the blue light filtering film 100 is required to be used, the release layer 160 is torn from the bonding surface, and the blue light filtering film 100 is fixed on the light emitting surface of the component required to filter blue light through the bonding layer 150. In this embodiment, the release layer 160 is made of PET, and the surface of the PET material is coated with fluorine. This allows the release layer 160 to be easily peeled off from the adhesive surface.
In this embodiment, the multilayer structure is adopted, and the refractive index difference of the materials of the different layers of the multilayer structure can reduce the energy of the blue light of the emitted light, thereby also being beneficial to reducing the energy of the blue light from high energy to harmless low-energy blue light, for example, when the blue light blocking layer 130 adopts Ti to3O5And SiO2The near infrared reflecting layer 120 includes a titanium dioxide layer. The number of layers on the base material layer 110 is titanium dioxide layer, Ti3O5Layer of SiO2Layer, adhesive layer. The titanium dioxide layer thus having a low refractive index, Ti3O5The layer being of high refractive index, SiO2The layer has the low refracting index, and the adhesive linkage adopts the high refracting index, and light loops through the low refracting index, high refracting index, and the low refracting index jets out again, sets up through the change of high low refracting index to the realization is filtered whole blue light and is pressed down or makes its harmful blue light energy decay.
The visible light transmittance of the blue light filtering film 100 in the scheme is as follows: 68% -78%; the visible light reflectance is: 12% -15%; ultraviolet permeability is: 1.5% -1.7%; the sunlight absorption rate is: 25% -35%; the solar reflectance is: 14% -24%; the solar light transmittance is: 46 to 56 percent. The visible light reflectivity of the adopted blue-light filtering film is as follows: 12% to 15%, and ultraviolet transmittance: 1.5% -1.7%; can have excellent filtering performance to high-energy blue light. The specific parameters of the blue light filtering film 100 in this embodiment are as follows: the visible light transmittance is: 73 percent; the visible light reflectance is: 13 percent; ultraviolet permeability is: 1.6 percent; the sunlight absorption rate is: 30 percent; the solar reflectance is: 19 percent; the solar light transmittance is: 51 percent. This strain blue light membrane 100 has outstanding blue light energy that falls, and the harmful blue light of high energy can be filtered like this, reduces the characteristic to the injury of human eye.
As shown in fig. 2, based on the same concept, the present invention also proposes a display apparatus including: a backlight module 200(BLU), a display panel 300(OC), and the blue light filtering film 100 (film). The backlight module 200 comprises a light source 400, the light source 400 is an LED light source 400, the display panel 300 is a liquid crystal display panel 300, and the display panel 300 is positioned at the light-emitting side of the backlight module 200; the blue light filtering film 100 is located on the light emitting side of the display panel 300. Through increasing foretell blue light membrane 100 of straining in display device, strain blue light membrane 100 and make the light that sends among the current display device pass through near infrared reflection layer 120, near infrared reflection layer 120 is used for reflecting near infrared light, can reduce the substrate effectively and have thermal-insulated effect to thermal absorption, light reachs blue light barrier layer 130 after near infrared reflection layer 120, blue light barrier layer 130 can separation ultraviolet ray and short wavelength visible light, thereby reduce the blue light energy, the harmful blue light of high energy can be filtered like this, reduce the injury to the eyes of people.
The dominant wavelength of the light emitted by the light source 400 in the scheme is 455nm-465 nm. The method specifically comprises the following steps: the LED backlight 400 uses a long-wave chip scheme to shift the wavelength of the light source 400 from the high-energy blue region (415-455nm, excluding 455nm) to the non-high-energy blue region (around 460 nm), so as to change the wavelength of the emitted blue light from the light source 400. The emitted blue light wavelength is in the blue light interval of about 460nm which is harmless to eyes, so that the harm of light to eyes when the eyes watch the display equipment is further reduced. The dominant wavelength of the light emitted from the light source 400 in this embodiment is 460nm, so that the generated blue light has low energy and minimal damage to eyes.
As shown in fig. 2 and 3, the display device further includes: the glass cover plate 500 is positioned on one side, facing away from the light source 400, of the blue light filtering film 100; this positions the blue light filtering film 100 on the inner surface of the glass cover plate 500, and the glass cover plate 500 protects the display panel 300 of the display device at the outer side of the display panel 300. The added blue light filtering film 100 is tightly attached to the light incident surface of the glass cover plate, so that the strength of the glass cover plate 500 can be increased besides the function of filtering blue light, and the glass cover plate 500 can be prevented from being tempered and the explosion-proof effect can be achieved. No additional tempered film is attached to the light-emitting surface of the glass cover plate 500.
An optical adhesive layer 600 is arranged between the glass cover plate 500 and the blue light filtering film 100, and the optical adhesive layer 600 is connected with the glass cover plate 500 and the blue light filtering film 100. The optical adhesive layer 600 is made of OCA optical adhesive. Make through optics glue film 600 strain blue light membrane 100 and glass apron 500 can be fixed firm, blue light barrier layer 130 orientation glass apron 500 sets up.
In this scheme glass apron 500 with it passes through to filter blue membrane 100 the setting of laminating entirely is adopted to optics glue film 600, and the technology of laminating entirely makes glass apron 500 with filter blue membrane 100 forms combined material glass apron. The fixing is firm, the looseness is not easy to occur, the display panel 300 and the glass cover plate 500 are seamlessly attached, and the blue light filtering film 100 is fixed, so that the screen is light and thin, dust does not enter the screen, the transparency is high, and the falling resistance is realized.
In the display device, the composite CG (composite material glass cover plate 500) is completed by full lamination of the blue light filtering film 100, and the whole blue light is filtered and pressed down or harmful blue light energy is attenuated, so that the display screen which truly protects health and eyes and has high image quality without sacrificing color temperature and visual effect is achieved. And then, the LED long-wave blue light chip is matched, so that the main wavelength of the long-wave blue light chip is shifted from 450 to about 460nm on the basis of directly reducing the blue light energy, the light source 400 does not generate high-energy blue light as much as possible, and a healthy eye-protecting interactive large screen with true significance can be realized.
In summary, the blue light filtering film and the display device provided by the present invention are provided, wherein the blue light filtering film 100 is disposed in the existing display device, so that light emitted from the existing display device passes through the near infrared light reflecting layer 120, the near infrared light reflecting layer is used for reflecting near infrared light, which can effectively reduce the absorption of the substrate to heat and has a heat insulation effect, the light passes through the near infrared light reflecting layer 120 and reaches the blue light blocking layer 130, and the blue light blocking layer 130 can block ultraviolet light and short wavelength visible light, thereby reducing blue light energy, so that high-energy harmful blue light can be filtered, and harm to human eyes can be reduced. Simultaneously, near infrared reflection stratum with blue light barrier layer 130 has different refracting indexes, utilizes the refracting index difference of rete material, can effectual reduction and filter the blue light, further reduces the high energy blue light that jets into in the people's eye, reaches safety standard, solves among the prior art with liquid crystal display direct application in the education exchange teaching and the blue light that produces has the problem of great injury to people's eye.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A blue-filtering film, comprising: a substrate layer;
the near infrared light reflecting layer is positioned on the light emergent side of the substrate layer;
and the blue light blocking layer is positioned on the light emitting side of the near-infrared light reflecting layer.
2. The blue-light-filtering film according to claim 1, further comprising:
and the hard coating is arranged on the light incidence surface of the substrate layer.
3. The blue-light-filtering film according to claim 2, further comprising:
the adhesive layer is arranged on the light-emitting surface of the blue light blocking layer;
the release layer is arranged on the light emitting surface of the adhesion layer in a peelable manner.
4. The blue light filtering film of claim 1, wherein the blue light blocking layer comprises: salicylate-based compounds and/or benzophenone-based compounds; or
The blue light blocking layer is Ti3O5And SiO2And evaporating the attachments.
5. The blue-filtering film according to claim 1, wherein said near-infrared light reflecting layer comprises titanium dioxide.
6. The blue-filtering film according to claim 1, characterized in that it is made of
The visible light reflectance is: 12% -15%;
ultraviolet permeability is: 1.5 to 1.7 percent.
7. A display device, comprising:
the backlight module comprises a light source;
the display panel is positioned on the light-emitting side of the backlight module; and
the blue light filtering film according to any one of claims 1 to 6, wherein the blue light filtering film is positioned on the light exit side of the display panel.
8. The display device of claim 7, wherein the dominant wavelength of light emitted by the light source is between 455nm and 465 nm.
9. The display device according to claim 7, characterized in that the display device further comprises:
the glass cover plate is positioned on one side, back to the light source, of the blue light filtering film;
the optical adhesive layer is positioned between the glass cover plate and the blue light filtering film and is connected with the glass cover plate and the blue light filtering film.
10. The display device of claim 9, wherein the glass cover plate and the blue light filtering film are disposed by being fully attached to each other through the optical adhesive layer.
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| CN202011500821.3A CN114637064A (en) | 2020-12-16 | 2020-12-16 | Blue light filtering film and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011500821.3A CN114637064A (en) | 2020-12-16 | 2020-12-16 | Blue light filtering film and display device |
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| CN114637064A true CN114637064A (en) | 2022-06-17 |
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| CN202011500821.3A Pending CN114637064A (en) | 2020-12-16 | 2020-12-16 | Blue light filtering film and display device |
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